Can't Join!!

Idk why but it won't let me join the server. After sitting there on logging in, it just says disconnected and directs me back to my list of severs. Can anyone help me out? Idk why it's doing this it's never done this to me before.

Also. while it is temporary down I would like you all to visit discourse.knockturnmc.com and signing up.
This is our new website and it will replace this very shortly.
the people looking here are only the people transferring things, lessons etc.